After getting the B gunpowder, Marin naturally wanted to test its power. So Marin found a mesh gun and a clockwork musket for testing.

The first test was the oldest version of the Spanish Mushket musket. This kind of musket was first made by the cannon smiths hired by Marin from Spain. It was made of the most ordinary barrel forged by cooked iron.

It should be pointed out that the earliest version of the Spanish Mushket musket was made by rolling iron sheets. That is, first roll a layer of iron sheets, then heat it and forge it repeatedly until a long time later the iron sheets were beaten and basically put together. Then, wrap it with the second layer of iron sheets and then heat it repeatedly forge it.

In short, the earliest Spanish gun barrel manufacturing method was very time-consuming. It took several months to build a barrel. Later, this method was passed on to the Ming Dynasty. The bird guns of the Ming Dynasty were forged with double-layer iron, which was very inefficient.

The barrel used in Beihai in Marin was learned from the video "The Gunsman of Williamsburg". It is made of a rectangular cooked iron plate and is forged and rolled directly. After rolling into an iron pipe, the craftsman sprinkles iron powder on the forging seams while it is hot, so that the forging seams are melted and welded by the iron powder at high temperature. Even, they will sprinkle iron ore powder on the hot forging seams, that is, iron oxide. After sprinkling, the reddish iron pipe is buried in the charcoal pile and the iron ore powder is reduced with the reduced iron ore, and the reduced iron ore is directly "grown" with the forging seams... This method of thermal reduction and forging makes the production of the barrel simple. A skilled craftsman can forge an iron pipe in a day. Those who are not skilled can almost be completed in two days.

Later, Marin improved the material properties. The initial quality of the iron was actually not good. Because there was no process of removing phosphorus and removing sulfur. In fact, this process was very simple, which was secondary refining, and then lime was put into the iron to make slag, remove phosphorus and sulfur. Then, a certain amount of graphite powder was added to increase the carbon content. After all, Marin remembered the No. 45 carbon steel used in later generations for 56 and a half, rather than the iron.

In other words, Marin now has three different barrels in his hand - a traditional iron rolled barrel, a traditional iron plate forged barrel, and a medium and low-carbon steel with poor carbon content control...

Because the power of B gunpowder is more than three times that of black gunpowder, Marin should be reduced to one-third of the charge. But Marin wanted to test the performance of the barrel. Then, he charged according to the usual mode...

As a result, the oldest version of the double-layer iron barrel exploded on the spot. Fortunately, when Marin tested, he used the method of inserting a long fuse from the fire door, which did not cause any casualties.

Then, the barrel made of cooked iron plates could not withstand the pressure. Although the blow-off did not happen, the barrel was deformed...

The barrel of medium and low carbon steel with only carbon content but not a large amount has withstood the test. However, there is no need for this...

Why? Even if you don’t reduce the launch medicine, it’s a waste to take it! Because, after signing a smoothbore gun to fly out of 100 yards, it’s basically a random flight. Even if you use B gunpowder with three times the power, it’s a waste. Because, even if you use black gunpowder, within 100 yards, the lethality is enough...

Then, naturally, we consider the problem of lowering the charge. It is obvious that when using B gunpowder, we can no longer load as many launching drugs as before. Otherwise, it will be wasted on smoothbore guns. Moreover, it is easy to explode.

As for how much reduction is, Marin decided to use the data of later Mauser rifles...

The Mauser 1871 is a black gunpowder rifle with a bullet caliber of 11mm and a length of 60mm. The G98, which switched to smokeless launching drugs, has a bullet caliber of 7.92mm and a length of 57mm. Of course, this length includes the warhead part.

After all, the charge of the new bullet is about half that of the black gunpowder. But its actual power is much greater. For example, Mauser 1871, the initial velocity of the bullet's bore is only 440m/s. However, the initial velocity of the bullet's bore with smokeless launching drugs has reached 800m/s... The charge is reduced by half, but the initial velocity is doubled...

Originally, Marin used 10 grams of black gunpowder to fire a clockwork with 30 grams of lead bullets. But now with B gunpowder, the amount of charge can be completely reduced. Due to the waste of kinetic energy beyond a hundred yards, Marin finally decided to reduce the charge to 3 grams when using B gunpowder...

After testing, the 3 grams charge is very reasonable. Because the power has not decreased at all...

But after this test, Marin discovered that using smokeless powder on a rifle does not make much sense...

Why? Because no matter whether you use black gunpowder or smokeless gunpowder, the effective range of the smoothbore gun is only about 100 yards, and you will get rid of the ashes even further. Moreover, the production cost of smokeless gunpowder is quite high and it is not cost-effective at all.

Unless it is the copper shell bullet of later generations, it is valuable to use smokeless gunpowder. After all, saving copper materials from eggshells alone will be a big sum of money.

But that's useless. Because Marin is not a chemistry student and does not know how to make a base fire...

Primer is a very difficult chemical problem. Unless top students of chemical engineering major travel through ancient times, people in other majors will not be able to solve the primerrr technique. Although there is mercury lysate that is the simplest primer, it is not easy to make up the thing. The stability is worse than nitrosilicate and it is extremely powerful. If you are not careful, you can kill yourself... So, don't think about it...

Therefore, Marin was embarrassed to find that the B gunpowder was made, but it had no effect on the musket...

When it comes to using artillery as a launching medicine... it seems that it is not possible... After all, the fire of muskets is fired at a few grams, while the fire of cannons is about pounds, and the fire of a few pounds of launching medicine...

Now the cost of Malin's smoky-free gunpowder is so high that it is used as a cannon launching medicine... I can't afford it, I can't afford it...

So Marin was completely depressed - he finally found a modern smokeless powder, but it was useless, so sad...

...

In the end, Marin's depression was "treated" by Doni Zerry...

How to "treat"? It turns out that as the captain of the blasting team, Doni Cry came to Marin to apply for a batch of powder kegs for training. After all, blasting work is also very important. In wartime, blasting teams can blast the enemy's city gates. In peacetime, they can still mine...

Doni Cry himself can't cure diseases or persuade people, but his arrival reminded Marin - since B gunpowder is not suitable for use as a launching medicine for smoothbore guns and smoothbore guns, it can still be used as a blasting medicine...

In any case, the explosion speed of B gunpowder is close to 2,000 meters per second, which is still the effect after being passivated. But it is also stronger than the explosion speed of black gunpowder with 500 meters per second.

So Marin asked Doni Cry to make a powder keg filled with B gunpowder to practice blasting. Sure enough, it was much more powerful and almost injured the members of the blasting team. However, this was still different from Marin's expectations...

Why? According to theoretical data, the explosion speed of B gunpowder is 4 times that of black gunpowder, and the amount of gas produced by combustion is more than 3 times that of black gunpowder. In theory, the power should be three times that of black gunpowder. However, experiments have shown that the explosive power of this new B gunpowder powder barrel is less than twice that of black gunpowder...

"What's going on?" Marin was a little confused. But when he picked up the B gunpowder particles in his hand and observed, he found the reason...

It turned out that it was a big deal for Marin himself. Because in order to reduce the combustion speed of B gunpowder, Marin deliberately passivated the surface of the particles. That is, he used beeswax solution to coat the surface of the particles with a thin layer of wax film. The existence of the wax film affected the combustion speed of the gunpowder particles and also affected the explosion speed...

So, Malin soaked the remaining B gunpowder again in alcohol, washed and filtered it, and removed the wax film on the surface. In this way, after testing, the power was indeed about 3 times that of the black powder barrel.

In the end, Marin decided that B gunpowder was specially used to make blasting cylinders...

However, now Marin will not fight with people for several years. Even if he has a blasting tube, it will be useless... It's really distressing...

Finally, a drunkard reminded him...

Marin went out to relax and saw a drunkard. He probably got drunk after drinking a bottle of Erguotou. He threw the small glass bottle half a pound away. The posture was very similar to the throwing of later generations... grenades...

"Yes, I can use B gunpowder to make grenades..."

Before, Marin had thought about getting grenades. However, the power of black gunpowder was too low, and the grenades made could only hurt people, not kill people. Even if steel balls were added, the power was still a bit low.

Many historical novels say that if black gunpowder is put into a pot, it can kill all directions, which is simply a comparison. In fact, the Eighth Route Army used black gunpowder as grenades back then. However, the grenades made in this way are of poor quality. Let's put it this way, earth grenades made of black gunpowder are often blown in half. As for the killing effect... they only kill, but not kill the enemy on the spot... Its biggest function is to send one or two Japanese to the hospital. Of course, there is another function, which is to scare the enemy with a big blow...

However, it is not right to say that this kind of earthy grenade cannot kill anyone at all. After all, if the steel balls or iron nails in the grenade happen to fly to the enemy's temples and other key parts, they can also be killed on the spot...

Those historical novels say that using black gunpowder jars to blow the enemy into overturning the horses... Stop blowing, but it is very likely to frighten the enemy's war horses. After all, animals are generally afraid of the sound of explosions. Especially when they have never encountered them, they are more likely to be frightened.

Speaking of which, the reason why the Ming army was able to defeat the Mongolian cavalry in the early Ming Dynasty was closely related to the fact that the war horses of the Mongolian army had not received relevant training at that time. In the final battle, the war horses were frightened on a large scale, and they even fought a P?

By the late Ming Dynasty, the Qing army knew how to adapt the training of war horses to the sound of gunfire (eliminate those who are not suitable) and gave the war horses a ear cup. Then, the role of the Ming army's firearms was greatly reduced...

...

Of course, that is talking about earth grenades made of black gunpowder. That kind of power is definitely not good, but if smokeless gunpowder is used with three times the power... Although its power cannot keep up with the effect of the high-explosive drug products of later generations, it is much better than the scary earth grenades made of black gunpowder...

So, Marin ordered to start developing a small iron can with wooden handles for B gunpowder as a grenade. As for the ignition method, because there is no cable technology, it can only be ignited with a fuse...
Chapter completed!